Who here actually blows through the MAF??

[Aricjm15]

we hooked the stock map sensor directly to the manifol per Juans directions, stock map sensor goes apeshit when it see's positive pressure and tosses CEL

 

[Kooldino]

we hooked the stock map sensor directly to the manifol per Juans directions, stock map sensor goes apeshit when it see's positive pressure and tosses CEL

Then why doesn't mine go apeshit?

 

[Super Matty P]

my stock MAP is connected to it's wiring harness but NOT a vaccuum source on the IM anymore.

I'm running just the haltech's MAP and the car runs and drives flawlessly (aside from being pig rich). No CEL's, nothing.

I'm 100% going to blow through the MAF and if I hit spark/fuel cut like I did on my msp we know we have a problem. I don't think it'll happen though. I should have concrete info on the 29th as that is when I dyno and get fully tuned.

does anyone see a problem with me having the BOV between the TB and the MAF?. I figured I would want it to vent prior to back-teracking through the MAF...i know people that install the MAF backwards on their cars with intakes have all sorts of problems....thoughts?

 

[Kooldino]

my stock MAP is connected to it's wiring harness but NOT a vaccuum source on the IM anymore.

I'm running just the haltech's MAP and the car runs and drives flawlessly (aside from being pig rich). No CEL's, nothing.

Odd. Once, I forgot to connect a vac line to my MAP, and the ECU threw a CEL because of it. "MAP voltage low" or something.

 

[Super Matty P]

no problems here with it....of course I'm not boosted yet....once it's actually receiving boost it may go haywire, until then though it's perfect.

 

[Kooldino]

no problems here with it....of course I'm not boosted yet....once it's actually receiving boost it may go haywire, until then though it's perfect.

Mine did it almost instantly, as soon as i turned the car on and let it idle.

 

[Reffoxel]

My understanding is the negative effect of running a pull through MAF sensor as a blow through MAF sensor is you'll destroy the sensor quicker. Not immediately but alot sooner than normal. This is just what I've been told by a performance mechanic I know.

 

[Super Matty P]

My understanding is the negative effect of running a pull through MAF sensor as a blow through MAF sensor is you'll destroy the sensor quicker. Not immediately but alot sooner than normal. This is just what I've been told by a performance mechanic I know.

I don't see how. Let's assume you're pulling in 400cfm of air THROUGH your maf...the turbo/super will compress it into a smaller tubing increasing pressure but it's still the same 400cfm of air.

Maybe the pressure will have some ill-effect on the durability but I can't imagine it being THAT bad since there are several people here doing it for several months with no problems. (dunno)

 

[BlkZoomZoom]

I would worry about the heat also.

 

[Reffoxel]

I was just quoting what I was told, I am by no means an engineer. By the same token if a MAF is a MAF then why do they make a distinction between pull through and blow through MAFs.

I don't see how. Let's assume you're pulling in 400cfm of air THROUGH your maf...the turbo/super will compress it into a smaller tubing increasing pressure but it's still the same 400cfm of air.

Maybe the pressure will have some ill-effect on the durability but I can't imagine it being THAT bad since there are several people here doing it for several months with no problems. (dunno)

 

[joka1]

i am running 12 psi daily through my maf on the pressure side. i have been doing this for 4 mths or so now with no problems. just to let you know.

 

[Super Matty P]

I would worry about the heat also.

I'm not worried about heat at all....my blower is ice cold all the time. Iv'e got a video floating around proving it. (lick)

I'm blowing through the Maf, just needed to hear from people that have done it if there were any problems.

thanks for the replies.

 

[BlkZoomZoom]

I forgot about the blower thing...lol Everybody is always talking turbos here.

 

[Super Matty P]

that's all you're allowed to talk about here!

Thanks for the help though. If I wasn't trying to mass produce a kit I'd snatch up your MAF in a second.

 

[Reffoxel]

Well, now ya'll got me thinking. So to help clear it up, I emailed Pro-M as to what the difference is between a Blow through and a pull through. Whether its a different type of MAF or same MAF different application. Will let you know what they say.

 

[THEGOLDPRO]

my question is i have been thinking of changing my setup as well, i want to put the maf on the pipe that connects to the throttle body, would it be better to run the maf before, or after my bov????? seems pointless to run it before it no???but i dunno.

 

[igdrasil]

If the P5 ecu was never "taught" to see boost, does it act the same as a MSP when hitting the 5v's? I imagine it has to do something to protect itself and more than likely throws a code, but does it actually do the same thing?

yeah...sometimes it does a hard ignition cut...and if it continues to see the problem, it will try stall the engine....

MPI tuned cars CAN get rid of the MAF and replace it with a MAP sensor. (poke)

I will be doing this this weekend. (gossip)

 

[KzA]

yea but doesnt that just throw an ass of CELs?

 

[Super Matty P]

Haltech cars (E6X) can ditch the MAF also. I chose the F10X though so I'll keep it. It's not THAT big of a problem since the TB is so small anyway. If the MAF restriction wasn't there the TB would be.

The question is "where to place the BOV". I placed mine between the MAF and TB so that it'll vent off ASAP. You may encounter stumbling/drivability issues or increase in lag by venting out like that....correct me if I'm wrong but with the haltech it's not an issue....and since the supercharger is constantly trying to cram air into the engine anyway...I love the "no lag" feeling of just snapping on the throttle and having it kick back at you!

 

[THEGOLDPRO]

so is it better to place the BOV between the MAF, and TB, or better to place the MAF between the TB and BOV???? lol